I am based in the Philippines and catch plenty of GT's and Spanish macks here trolling lures but didn't figure out yet how to hook tunas from the TI...(I am seeing sometimes tunas hunting on the surface but they don't like my trolled rapallas...)

From your video I see that you are casting for tuna.

Would you mind to share what lures you use when casting for tunas? Do they bite also on your trolled lures or is casting the best way to hook them?